Furnace bottom ash as a fine aggregate

Abstract

Consideration has been given to the use of alternative materials, including industrial waste, in pavement construction. One such material is furnace bottom ash. In view of its comparatively low strength, some form of improvement is necessary and this paper is concerned with cement stabilisation.

Tests on four furnace bottom ashes indicated that they satisfy the requirements materials to be stabilised. The suitability of the stabilised mixtures has been assessed using the characteristics of strength and durability. The stabilised ashes produced materials suitable for pavement construction, with cement contents of approximately 80 kg/m3. At cement contents of 10%, the mixtures developed 28 days cube strengths in excess of 20 MPa, and the results indicated further strength development by pozzolanic reactions.